Reproduction of female Japanese serow based on the morphology of ovaries and fetuses

Kita, Isao; Sugimura, Makoto; Suzuki, Yoshitaka; Tiba, Toshiro; Miura, Shingo

doi:10.1007/978-94-011-8030-6_28

Cited by 6 publications

(2 citation statements)

References 4 publications

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“…Ochiai et al (2010) reported that female reproductive rates with the number of surviving offspring over one In the Gifu and Nagano Prefectures, the age at first reproduction of culled serows determined through anatomical checks of embryos was 2-6 years of age, and the mean age was 3.7 years (Miura and Tokida 1993). In the Gifu Prefecture, Kita et al (1983) also stated that ovulation and pregnancy rates were approximately 10% and 1.5% in 1.5-year-old females, and about 30% and 23.1% in 2.5-year-old females, respectively. Miura et al (1987) reported the age at first reproduction using the horn annuli method in the Gifu and Nagano Prefectures: 172 females, 14.5% at two years, 27.9% at three years, 39.4% at four years, and 18.0% at five years.…”

Section: Discussionmentioning

confidence: 99%

Characteristics of Female Reproductive Success in a High-Density Population of the Japanese Serow, Capricornis crispus, in Akita, Northern Honshu, Japan

Kishimoto,

Kuroe

2024

Mammal Study

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There have been few field studies to date on female reproductive success in the Japanese serow, Capricornis crispus. Data were collected on female reproduction and kid mortality in a highdensity population in Akita City, Japan, for seven years from 1979 to 1985. The parturition rate from 1979 to 1984 was at least 81.1%, and the annual variation (73.3-85.7%) was not significant. Each adult female usually gave birth to a single kid in successive years and may have intermittently had 1-or 2-year interruptions of parturition. In the seven females observed from zero or one year of age, four (57.1%) and three females (42.9%) first gave birth at three and four years of age, respectively. The kid mortality rate from 1979 to 1984 was 54.7%, and the annual variation (27.3-88.9%) was significant. Compared with the pregnancy rates of culled serows in low-density local populations, parturition rates were remarkably high in the study area, perhaps because of good nutritional conditions. In low-density populations such as red-listed areas, it is necessary to monitor fertility rates as well as population densities to avoid local extinction.

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Section: Discussionmentioning

confidence: 99%

Characteristics of Female Reproductive Success in a High-Density Population of the Japanese Serow, Capricornis crispus, in Akita, Northern Honshu, Japan

Kishimoto,

Kuroe

2024

Mammal Study

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“…The breeding season in the Japanese serow has been reported to be between September and January, during autumn and winter in Japan [27]. The experimental period of this study started on 20 October.…”

Section: Discussionmentioning

confidence: 99%

Plasma and Fecal Sex Steroid Hormone Profiles During the Estrous Cycle in a Japanese Serow (Capricornis crispus)

Togashi

Tsujimoto²,

Yamauchi

et al. 2009

Journal of Reproduction and Development

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Abstract. We aimed to determine plasma progesterone and estradiol-17β concentrations, as well as fecal progesterone concentrations during the estrous cycle in a female 8-year-old Japanese serow (Capricornis crispus). The step frequencies during the night were recorded by a pedometer attached to the serow's hind leg from October to the following June. Estrous behavior was also monitored during the day. Blood samples were taken once a day from 8 February to 10 March from an indwelling catheter placed in the jugular vein. Fecal samples were taken once or twice a day from 1 January to 29 April. Plasma and fecal progesterone and plasma estradiol concentrations were determined using timeresolved fluoroimmunoassays. The estrus behavior observed lasted for 2-3 days. Peak step frequencies were recorded between November and April, at intervals of 17-19 days. Plasma progesterone concentrations remained elevated (1-7.7 ng/ml) for 12 days during non-estrus, and plasma estradiol concentrations were highest when the peak step frequency and estrous behavior were observed.Step frequency increased around the times fecal progesterone levels fell to basal levels. Progesterone concentrations in feces were significantly correlated with those in sera. Thus, measurement of fecal progesterone concentrations might be useful for monitoring the reproductive status of the Japanese serow.

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Histological Difference between Retrograde Corpora Lutea of Pregnancy and Those of Estrus in Sika Deer, Cervus nippon.

Kita

Takatsuki²,

Tiba³

1994

The Journal of Veterinary Medical Science

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Reproduction of female Japanese serow based on the morphology of ovaries and fetuses

Cited by 6 publications

References 4 publications

Characteristics of Female Reproductive Success in a High-Density Population of the Japanese Serow, Capricornis crispus, in Akita, Northern Honshu, Japan

Characteristics of Female Reproductive Success in a High-Density Population of the Japanese Serow, Capricornis crispus, in Akita, Northern Honshu, Japan

Plasma and Fecal Sex Steroid Hormone Profiles During the Estrous Cycle in a Japanese Serow (Capricornis crispus)

Histological Difference between Retrograde Corpora Lutea of Pregnancy and Those of Estrus in Sika Deer, Cervus nippon.

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